001/*
002 * Copyright 2006-2007 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      https://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.batch.repeat.policy;
018
019import org.springframework.batch.repeat.CompletionPolicy;
020import org.springframework.batch.repeat.RepeatStatus;
021import org.springframework.batch.repeat.RepeatContext;
022import org.springframework.batch.repeat.context.RepeatContextSupport;
023
024/**
025 * Very simple base class for {@link CompletionPolicy} implementations.
026 * 
027 * @author Dave Syer
028 * 
029 */
030public class CompletionPolicySupport implements CompletionPolicy {
031
032        /**
033         * If exit status is not continuable return <code>true</code>, otherwise
034         * delegate to {@link #isComplete(RepeatContext)}.
035         * 
036         * @see org.springframework.batch.repeat.CompletionPolicy#isComplete(org.springframework.batch.repeat.RepeatContext,
037         * RepeatStatus)
038         */
039    @Override
040        public boolean isComplete(RepeatContext context, RepeatStatus result) {
041                if (result != null && !result.isContinuable()) {
042                        return true;
043                }
044                else {
045                        return isComplete(context);
046                }
047        }
048
049        /**
050         * Always true.
051         * 
052         * @see org.springframework.batch.repeat.CompletionPolicy#isComplete(org.springframework.batch.repeat.RepeatContext)
053         */
054    @Override
055        public boolean isComplete(RepeatContext context) {
056                return true;
057        }
058
059        /**
060         * Build a new {@link RepeatContextSupport} and return it.
061         * 
062         * @see org.springframework.batch.repeat.CompletionPolicy#start(RepeatContext)
063         */
064    @Override
065        public RepeatContext start(RepeatContext context) {
066                return new RepeatContextSupport(context);
067        }
068
069        /**
070         * Increment the context so the counter is up to date. Do nothing else.
071         * 
072         * @see org.springframework.batch.repeat.CompletionPolicy#update(org.springframework.batch.repeat.RepeatContext)
073         */
074    @Override
075        public void update(RepeatContext context) {
076                if (context instanceof RepeatContextSupport) {
077                        ((RepeatContextSupport) context).increment();
078                }
079        }
080
081}